diff options
Diffstat (limited to 'src/import/chips/p9/procedures/hwp/memory/lib/utils/swizzle.H')
| -rw-r--r-- | src/import/chips/p9/procedures/hwp/memory/lib/utils/swizzle.H | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/import/chips/p9/procedures/hwp/memory/lib/utils/swizzle.H b/src/import/chips/p9/procedures/hwp/memory/lib/utils/swizzle.H index 260197a66..57523f5bd 100644 --- a/src/import/chips/p9/procedures/hwp/memory/lib/utils/swizzle.H +++ b/src/import/chips/p9/procedures/hwp/memory/lib/utils/swizzle.H @@ -5,7 +5,7 @@ /* */ /* OpenPOWER HostBoot Project */ /* */ -/* Contributors Listed Below - COPYRIGHT 2015,2017 */ +/* Contributors Listed Below - COPYRIGHT 2015,2018 */ /* [+] International Business Machines Corp. */ /* */ /* */ @@ -42,6 +42,27 @@ namespace mss { /// +/// @brief Endian swapping +/// @tparam T input type +/// @param[in,out] io_input integral input +/// @note https://stackoverflow.com/questions/105252/how-do-i-convert-between-big-endian-and-little-endian-values-in-c +/// +template < typename T > +void endian_swap(T& io_input) +{ + constexpr size_t MIN_BYTES = 2; + static_assert(sizeof(T) >= MIN_BYTES, "Byte swapping requires at least 2 bytes of data"); + + uint8_t* l_varArray = reinterpret_cast<uint8_t*>(&io_input); + + for(size_t i = 0; i < sizeof(io_input) / 2; i++) + { + const size_t BYTE_SWAP_INDEX = sizeof(io_input) - 1 - i; + std::swap(l_varArray[BYTE_SWAP_INDEX], l_varArray[i]); + } +} + +/// /// @brief Swap two bits in a buffer /// @tparam TB the bit in the buffer to move to SB /// @tparam SB the bit in the buffer to move to TB |
